now-cli/lib/scale.js

// Ours
const Now = require('../lib');

module.exports = class Scale extends Now {

  getInstances(id) {
    return this.retry(async (bail, attempt) => {
      if (this._debug) {
        console.time(
          `> [debug] #${attempt} GET /deployments/${id}/instances`
        );
      }

      const res = await this._fetch(`/now/deployments/${id}/instances`, {
        method: 'GET'
      });

      if (this._debug) {
        console.timeEnd(
          `> [debug] #${attempt} GET /deployments/${id}/instances`
        );
      }

      if (res.status === 403) {
        return bail(new Error('Unauthorized'));
      }

      const body = await res.json();

      if (res.status !== 200) {
        if (res.status === 404 || res.status === 400) {
          const err = new Error(body.error.message);
          err.userError = true;
          return bail(err);
        }

        throw new Error(body.error.message);
      }

      return body;
    });
  }
};